Purification of carbon dioxide

Details Purification of carbon dioxide Purification of carbon dioxide

2005-11-28

2008-08-26

Vanoy, Timothy C (Department: 1793)

Chemistry of inorganic compounds

Carbon or compound thereof

Oxygen containing

C423S235000, C423S243010, C423S243020, C423S243030, C423S393000, C423S522000, C423S523000

Reexamination Certificate

active

07416716

ABSTRACT:
SO2and/or NOxare removed from gaseous CO2at elevated pressure(s) in the presence of molecular oxygen and water and, when SO2is to be removed, NOx, to convert SO2to sulfuric acid and/or NOxto nitric acid. The sulfuric acid and/or nitric acid is/are then removed from the gaseous carbon dioxide to produce SO2-free, NOx-lean carbon dioxide gas. The invention has particular application in the removal of SO2and/or NOxfrom carbon dioxide flue gas produced in an oxyfuel combustion process, for example, in a pulverized coal fired power station.

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Keilin, “Development of the Catalytic Chamber Process for the Manufacture of Sulfuric and Nitric Acids from Waste Flue Gases”, Contract No. PH86-68-75; Prepared for the US Environmental Protection Agency Office of Air Programs 1967 to 1969.

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